.tool_a{
    max-width: 20rem;
    width: 100%;
    border: 1px solid #d7deea;
    padding: 0.75rem;
    margin: auto;
    border-radius: 3px;
}

.night .tool_a{
    border: 1px solid #374151;
}

.tool_a button{
    height: 1.8rem;
    line-height: 1.8rem;
    width: 100%;
    border: 1px solid #01a0e9;
    background-color: #01a0e9;
    color: #fff;
    border-radius: 3px;
}

.res{
    display: none;
    text-align: center;
    margin-top: 0.75rem;
}

.res textarea{
    max-width: 20rem;
    width: 100%;
    border: 1px solid #d7deea;
    border-radius: 3px;
    padding: 0.5rem;
}

.night .res textarea {
    background-color: #0f1827;
    border: 1px solid #374151;
    color: #aaa;
    padding: 0.5rem;
}